Gear Rack 1).Material:C45 2).Mod.1, 1.5, 2, 2.5, 3, 4, 5,6 3).ISO9001 Quality system 4). ... : 20 Gear RackFeatures:1).Material:C452).Mod.1, 1.5, 2, 2.5, 3, 4, 5,63).ISO9001 Quality system4).Pressure angle ... *4040*4040*40550*5050*5050*506 60*6060*60 Gear Racks